2102540155434 has 24 divisors (see below), whose sum is σ = 4555531730880. Its totient is φ = 700842401448.

The previous prime is 2102540155433. The next prime is 2102540155447. The reversal of 2102540155434 is 4345510452012.

2102540155434 is a `hidden beast` number, since 2 + 10 + 25 + 40 + 1 + 554 + 34 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2102540155433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4217869 + ... + 4689935.

It is an arithmetic number, because the mean of its divisors is an integer number (189813822120).

Almost surely, 2^{2102540155434} is an apocalyptic number.

2102540155434 is an abundant number, since it is smaller than the sum of its proper divisors (2452991575446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102540155434 is a wasteful number, since it uses less digits than its factorization.

2102540155434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719514 (or 719511 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 2102540155434 in words is "two trillion, one hundred two billion, five hundred forty million, one hundred fifty-five thousand, four hundred thirty-four".